1221120102202 has 64 divisors (see below), whose sum is σ = 2464586901504. Its totient is φ = 438223343040.

The previous prime is 1221120102193. The next prime is 1221120102221. The reversal of 1221120102202 is 2022010211221.

It is a happy number.

It is a super-2 number, since 2×1221120102202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281883 + ... + 1587985.

It is an arithmetic number, because the mean of its divisors is an integer number (38509170336).

Almost surely, 2^{1221120102202} is an apocalyptic number.

1221120102202 is an abundant number, since it is smaller than the sum of its proper divisors (1243466799302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221120102202 is a wasteful number, since it uses less digits than its factorization.

1221120102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306603.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221120102202 its reverse (2022010211221), we get a palindrome (3243130313423).

The spelling of 1221120102202 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred two".